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MEDIUM severity

SilverStripe Denial of Service on flush and development URL toolsGHSA-5fr8-xhqq-4p3q

MEDIUMFix: silverstripe/silverstripe-framework@ca56e8d

GHSA-5fr8-xhqq-4p3q is a medium-severity (CVSS 4.3) Cross-Site Request Forgery (CSRF) vulnerability in silverstripe/framework. A fix is available for silverstripe/framework — see the affected versions and patch details below.

Also known asCVE-2019-12246
Published
Updated
Affected
2 pkgs
Patched
1 / 2
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.7%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs53th percentile — riskier than 53% of all scored CVEsHighest risk
0.00%0.40%0.80%1.20%0.2%0.7%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

2 pkgs affected
🐘silverstripe/framework🐘silverstripe/framework

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.

Description

SilverStripe through 4.3.3 allows a Denial of Service on flush and development URL tools.

Affected Packages

2 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistsilverstripe/framework≥ 4.0.0&&< 4.4.04.4.0composer require silverstripe/framework:^4.4.0
🐘Packagistsilverstripe/frameworkall versionsNo fix

Affected Products

1 product · 1 configurations
Application
silverstripesilverstripe
≤ 4.3.3
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for silverstripe/framework, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update silverstripe/framework to 4.4.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-5fr8-xhqq-4p3q is resolved across your whole dependency graph.

  3. Workarounds

    Cap what an attacker can consume: apply request size, rate and timeout limits in front of the affected component, and run it with memory and CPU limits so exhaustion degrades one worker rather than the whole service.

Frequently Asked Questions

SilverStripe before 4.4.0 allows a Denial of Service on flush and development URL tools.
O3 Security · Impact-Aware SCA

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SilverStripe Denial of Service on flush and development…